My 93 leaked like crazy until I made some changes. When I bought it there was heavy mold on the carpet and it didn't smell very spring fresh. The reason that the seller sold it was because he couldn't track down an electrical problem that turned out to be a direct result of all the leaks.

My 90 on the other hand hasn't leaked and probably never will. No sunroof and a better roof drainage ststem with the doors tucked under. Yet another reason I prefer the 87-91 body style.

my grey one had a nasty trunk leak, its not as common for ours to leak but it happens.

Thats a good point, the doors are hidden underneath the drain...a much better design. Yeah, I am just trying to figure out why everyone else has leaks and I don't, but I guess it is just apart of this bodystyle to not have it leak.

Well, I'll just go ahead and say that I was shocked when I bought this car and discovered what the "common problems" were. Leaking? That was the last thing on my mind when signed all the paperwork at the dealership. lol. I guess GM didn't do much in the way of extensive water intrusion testing. However, my sister has a TL, which regardless of your views of foriegn cars is still one nice ride, and her trunk leaks like a Sieve! So I think its more a problem with newer cars in general then with Bonnevilles in particular.